Sleeve-valve-driving mechanism



Jain. 20, 1931. A; M. NIVEN 1,789,341

SLEEVE VALVE DRIVING MECHAP IISM Filed-Aug. 15, 1928 2 Sheets-Sheet 1 ATTORNEY.

Jan. 20, 1931. A. M. NlVEN SLEEVE VALVE DRIVING MECHANISM 2 Sheets-Sheet 2 Filed Aug. 13, 1928 A TTORNEY.

Patented Jan. 20, 1931 mm sures IPATET oFF icEY Anemia macrna n NIvnN; onnn'rnorr, MIGH1GAN,,AASS1G1\T0R To CONTINENTAL MOTORS CORPORATION, or nnrnorr, MICHIGAN, ACORPORATIONOE VIRGINIA- sLEnvn-vALvn-nn-Ivme MECHANISM v Application filed nu iist 13, 1928; Serial No. 299,212.

This'inventionrelates to internal combustion engines of the Burt-McColluni sleeve valvetype in which a single sleeve is moved inzafcombined reciprocating and oscillating path. ,More particularly my invention pro- 'vides' an improved driving mechanism for the sleeve.

' In general my inventionicomprises a multiarmed driving element actuated by the valveshaft, one arm of the element connected with the sleeve and another arm being guided so as to impart to the sleeve a closed curve path.

One important advantage of my improved drive resides in the movement imparted to the sleeve, the movement being in the-form of a symmetrical figure afiording ready computating andla-ying out of the cylinderand sleeve 7 ports for performing the usual valving'func- "tions of the engine.

A further feature ofmy invention resides in the provision of a simple drivingmechanism which may be manufactured cheaply and assembled readily.

plurality of sleeves,

'Referring to the drawings which illustrate an embodiment of the invention,

Fig. 1 is a sectional elevation view through a typical cylinder of the engine showing the sleeve driving mechanism, F g. 2 is a fragmentary plan view partly in section showin the valveshaft drivlng a 1 I Fig. 3 is a detail elevation'view of the sleeve I crankcase 16 and is actuated by connecting driving element, and

Fig.4 is a diagrammatic viewillustrating the path of movement of the driving element at its point of connection with the sleeve.

Reference character A represents the engine having one or more cylinders 10, cylinder head 11 with spark plug opening 12 and cylinder intake and exhaust ports 13 and 14. The usual crankshaft 15 is located in rod 17 and piston 18, the parts associated with one typical cylinder being described and illustrated for convenience.

Located co-axially with the cylinder and preferably intermediate the cylinder 10 and 7 piston 18 is a sleeve valve B having a lower portion projectinginto the crankcase for recelving the drive and an upper portion provided with ports 19 for cooperation with the cylinder ports 13 and" 14. Thehparticular 1 side of the sleeves B and is rotatablein spaced 7 .5 ,A valveshaft'C is locate'd'preferably to-one- I I bearings 20. The ivalveshaft is driven as usual for a four stroke cycleengine at half crankshaft speed by any suitable driving means 21.

The valveshaft C has spacedvcranks 22, each crank operating the sleeve driving element D.

The element D has a bearing 23 and..associated I bearingcap 24 engaging crank 22, the main body portion of the elementfurther being 1 constructed substantially" L -sh'apecl; one arm 25 extending substantially horizontally and inwardly toward the'sleeve Bend the other; arm 26 extendingfsubstantially vertically-and preferably downwardly. for convenience into the crankcase '16,

The arm 25 carriesalaterally projecting I pin 27 slidable in ball28'to permit rotational movement of the sleeve. Ball 28 ismovable I in socket 29 carried in the sleeve drivinglug 30 The arm 26 is pivoted by a pin 31 to a pin 32 which is guided for reciprocation in a bearing 33 conveniently carried inwardly from thecrankcaselGfi I In operation the valveshaft C is drifven rv from crankshaft 15, each. crank 22 movingthe driving element Ds'o as to'impart the comb-ine'd movement to sleeveB. Referring to Fig; 4 the pin'27 is movediniasubstantially symmetrical ellipticalpath 34lwhichmay be varied to more nearly approach a circle as desired by varying the lengths of arms-25,- 26. Thus any point-on the sleeve will trace a closed curve symmetrical path on the cylinder sub stantially asindi'cated at 34c." 1

lVhat I cl aim as'my invention is:

1. In;an internalcombustion engine, a cylinder ported for intake and exhaust, a piston reciprocating within the" cylinder; a crank shaft driven froin the piston, a sleeve valve coaxial with the cylinder and ported for coperationwith the cylinder ports, a valveshaft driven fromthe crankshaft, and a rigid substantially L-shaped driving element transmittingthe drive from the valveshaft to the sleeve for impartingthereto a combined reciprocating and oscillating movement.

2. In an internal combustlon engine, a cylinder ported for intake and exhaust, a piston reciprocating Within the cylinder, a crank shaft driven from the piston, aisleeve valve co-axia'l with the cylinder and ported for cooperation with the cylinder ports, avalveshaft driven from the crankshaft, a multi arm drivi'ng elementftransmitting the drive from the valveshaft to the sleeve for imparting thereto a combined reciprocating and oscillating movement, one arm of said element extending substantiallyvertically with respect to a hori-' zontal plane containing the valve shaft axis,

and means guiding movement of the 'las tlsaid I arm. 3

3. In an internal combustion engine, a cylinder ported for intake and exhaust, a'piston reciprocating withinthe cylinder, a crankshaft driven fromlthe piston, a sleeve valve co-a'xial with the cylinder and ported for cooperation withthe cylinder ports, a valveshaft driven from the crankshaft, a multiarm driving element transmitting the drive from the valveshaft to the sleeve for impart ling thereto a combined reciprocating and 0s cillating movement, one arm of said element :"extending substantiallyhorizontally of the 30 engine for connection withthe sleeve, andanother arm "of saldelement extending substantially vertically of'theengine. '4. In an internal comhnstion engine, a

cylinder ported forintake and exhaust, a piston, reciprocating within the cylinder, a crankshaft driven from the piston, a sleeve valve co-axial with the cylinder and ported for cooperation with the cylinder ports a valveshaft driven from the crardxshaft, a

'multi-arm driving element transmitting the drive from the valveshaft to the sleeve for imparting thereto a combined reclprocating and oscillating movement, one arm of said element extending substantially vertically.

means. guiding'inovelnent of the :last said arm, aguide element plvotally connected to the last said arm, anda bearing for said guide element.

5. In an internal combustion engine,- a

cylinder ported for intake and exhaust, a

piston reciprocating within the cylinder, a crankshaft driven from the piston, a sleeve valve co-axial with the cylinder and ported for cooperation with the cylinder ports, a

valveshaftdriven from the crankshaft, a

single multi-arm L-shaped driving element transmitting the drive from they-valveshaft to the sleeve for imparting thereto a compiston reciprocating within the cylinder, a crankshaft driven from the piston, a sleeve valve coaxial with the cylinder and ported for cooperation with the cylinder ports, a valveshaft driven from the crankshaft, and

r a multi-arm driving element transmitting the valveshaft'driven from the'cra'nkshafh-a hell crank lever intermediate the valveshaft and sleeve and having one arm extending substantially vertically with respect to a horizontal plane containing the valve shaft axis, means connecting said 'leverwith the sleeve, and means for reciprocatingly guiding the movement of said vertically extending arm for imparting to the sleeve a combined reciprocating and oscillating movement.

8. In an internal oombustionengine, a 'CYllIldBI' ported for intake and exhaust, a-

pi-ston reciprocating within the cylinder, a crankshaft "driven from the piston, a sleeve valve co-axial with the cylinder and ported for cooperation with the cylinder ports,*a"

valveshaft driven from the crankshaft, and a multi-arm L-shaped driving element transmitting the drive from the valveshaft 'to the sleeve'for imparting thereto a combined reciprocatingand oscillating movement, one arm of said element extending laterally for connection-t0 the sleeve andanother arm ex tending downwardly" from f the valveshaft withinthe engine crankcase to oneside of the crankshaft, and means extending inwardly from the wall of the crankcase for recipro- V catingly guiding said last mentioned arm In witness whereof, I hereunto subscribe my name this 3rd day of August,A. D. 1928.

ARCHIE MACPHAIL NIV'EN.

bined reciprocating andoscillating movement, one arm of saidelement being provided with a laterally extending crank pin, and a ball and socket connection between the sleeve and crank pin.

' 6. In an internal combustion engine, a

' cylinder ported for intake and exhaust, a 

